Q. Which equation has the same solution as x2+13x−20=1 ?(x−6.5)2=63.25(x−6.5)2=−21.25(x+6.5)2=63.25(x+6.5)2=−21.25
Simplify Equation: Simplify the given equation by subtracting 1 from both sides to set it equal to zero.x2+13x−20−1=0x2+13x−21=0
Complete the Square: Look for a way to express the given equation as a perfect square if possible. We can try to complete the square by finding a number that, when added and subtracted to the x-term, forms a perfect square trinomial.The coefficient of the x-term is 13, so we take half of it, which is 6.5, and square it to get 42.25. We will add and subtract this number to complete the square.x2+13x+42.25−42.25−21=0
Rewrite and Simplify: Rewrite the equation with the completed square and simplify the constants on the right side.(x+6.5)2−42.25−21=0(x+6.5)2−63.25=0
Find Equivalent Equation: Now we need to find an equation that has the same solution as the completed square form of the original equation.We can see that the equation (x+6.5)2=63.25 has the same solution as the completed square form of the original equation.